Remove FLAG_ACTIVITY_NEW_TASK when starting tachyon

Having this flag conflicts with startActivityWithResult which
results in not passing the signature check on the other side.

Test: Manually verified the video calls are started without needing
to confirm.

Bug: 36874501
Change-Id: Icd45076ad03438e00a00403109503600f6e18b26
diff --git a/src/com/android/contacts/quickcontact/QuickContactActivity.java b/src/com/android/contacts/quickcontact/QuickContactActivity.java
index 4a4b8d6..3c088b4 100644
--- a/src/com/android/contacts/quickcontact/QuickContactActivity.java
+++ b/src/com/android/contacts/quickcontact/QuickContactActivity.java
@@ -436,8 +436,6 @@
                 }
             }
 
-            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-
             mHasIntentLaunched = true;
             try {
                 final int actionType = intent.getIntExtra(EXTRA_ACTION_TYPE,
@@ -445,10 +443,12 @@
                 final String thirdPartyAction = intent.getStringExtra(EXTRA_THIRD_PARTY_ACTION);
                 Logger.logQuickContactEvent(mReferrer, mContactType,
                         CardType.UNKNOWN_CARD, actionType, thirdPartyAction);
-                // For the tachyon call action, we need to use startActivityForResult.
+                // For the tachyon call action, we need to use startActivityForResult and not
+                // add FLAG_ACTIVITY_NEW_TASK to the intent.
                 if (TACHYON_CALL_ACTION.equals(intent.getAction())) {
                     QuickContactActivity.this.startActivityForResult(intent, /* requestCode */ 0);
                 } else {
+                    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                     ImplicitIntentsUtil.startActivityInAppIfPossible(QuickContactActivity.this,
                             intent);
                 }